Oil compression compensation system
US4909060A · kind A · utility
2Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1988 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Jan 26, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B31/32
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pre-set fluid actuator for setting the roll gap of a rolling mill having a transducer for detecting actuator movement and an electrohydraulic servovalve for controlling its position, a control system for compensating for the compressibility of the actuator fluid caused by the rolling force in a manner that requires no operation of the servovalve by creating a pre-set anticipating compression compensation signal and reducing the output of this signal by the output of a signal representing the actual fluid compression caused by the actual rolling force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.